[Package contents] Electronic pH meter + 3 packs of calibration powder (pH 4 00, 6 86, pH 9 18), English instruction manual, storage box FAST AND ACCURATE READINGThe pH meter tester has a sensitive electrode sensor that can read the pH value accurately ATC FunctionWater quality tester with ATC function, 0C to 50C automatic temperature compensation, 0 00 to 14 00 pH measurement, +/- 0 01pH high precision Easy to UseTo read the pool ph tester, just remove the protective cover, turn on the switch button, immerse the electrode in the test solution, shake the solution gently, and wait 30 seconds for the reading to complete Wide UseThe hydroponic ph meter is ideal for testing drinking water, swimming pools, aquariums, spas and hydroponics If you have any questions, please feel free to contact us describe:Measuring range: 0 00-14 00pHResolution: 0 01pHAccuracy: 0 01pHTemperature Compensation: 0-50CSpecification:Product Name: Pool pH MeterSize: 15 5 x 3cmyellowBattery: 2*LR44 built-in button battery- Quantity: 1 piece- Application: drinking water, aquarium, hydroponics, swimming pool, spa, spaThe set includes:1 * PH meter3 * PH calibration powder (4 0; 6 86; 9 18)1 * English user manual1 * Storage BoxComment-1 Rinse and dry the test probe after each use of the electronic fish tank pH meter -2 This digital pH meter can only test water from 0-50C, otherwise the glass electrode will burst -3 This electronic cell pH tester is not recommended for strongly acidic and alkaline liquids with an acidity below 2 or an alkalinity above 13 -4 pH water test pens should be calibrated for very frequent or infrequent prolonged use -5 The LCD screen of the water quality tester is not backlit